66735887 has 2 divisors, whose sum is σ = 66735888. Its totient is φ = 66735886.

The previous prime is 66735883. The next prime is 66735913. The reversal of 66735887 is 78853766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66735887 - 2² = 66735883 is a prime.

It is a super-2 number, since 2×66735887² = 8907357227353538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66735881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367943 + 33367944.

It is an arithmetic number, because the mean of its divisors is an integer number (33367944).

Almost surely, 2^66735887 is an apocalyptic number.

66735887 is a deficient number, since it is larger than the sum of its proper divisors (1).

66735887 is an equidigital number, since it uses as much as digits as its factorization.

66735887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 66735887 is about 8169.2035719524. The cubic root of 66735887 is about 405.6204218451.

The spelling of 66735887 in words is "sixty-six million, seven hundred thirty-five thousand, eight hundred eighty-seven".